Sucker-rod trap



R. H. STEGEMAN.

SUCKER ROD TRAP.

APPLICATION FILED MAR.15,1921.

omiso l RALPH: H. STEGEMAN, or ANAEIM, cALIroRNI'A.

sUcKER-Ron 'TRAE'.

1,at09,424c.

Specification of Letters Patent. Y

Patented Main-14219.22.

Application led March 15, y1921. Serial No. 452,561.

section aft-er section from the pump casing in order to permit ofunscrewing and removal of the withdrawn sections.l

More specifically the invention conteniplates the provision of holdingmeans readily secured to the pump casing with the sucker rod extendingthrough the same,said holding means including a pivoted collar normallyswung byv gravity into position engaging beneath one ofthe couplingmembers of the-suckerrod, in' orderto A.prevent downward movement ofthesucker-rod, and also arranged to beswung upwardly toper-A mit withdrawalof a lsectionofther sucker rod when av coupling member ofthe sucker rodimpinges againstthe pivoted collar.

The invention-also,provides for the swinging of the pivotedcollar'entirely out of en.- gagement with the sucker rod 'when 4so desired, means being providedfor automatically yieldably.retainingvthepivotedlcollar in such position.

The invention will be `vreadily understood from the followingdescription nof the accompanying drawings, in which-'- Figure'l is asideelevation of the device in position with relation to ya pump casingand the sucker rod within the. same.'

Fig. 2 is a top plan view showing'the holding means and sucker rodextended through the same.

Fig. 3 is a'transverse section 3*-3 of F ig. 1.V

Fig. 4 is a longitudinal section on the line 4 4 of Fig. 2 showing thepivotedcollar of the holding-meansbe'fore the same is moved intoengaging position with relation to the sucker rod. n

.Fig.5 is a similar view showing the pivoted collar Abeing swungupwardlyby a cou# pling member of the sucker rod impinging against thesame in order to permit of'withdrawal of the sucker rod. V

Fig. A,6 is a fragmentary side elevation on lthe yline position engagingbeneath i the coupling member of the sucker rod '.to preventfreturn ofthe sucker rodinto the pump casing.` Fig. 7 is a similar view showingthe opposite side of the device.

Fig. 8 is a similar viewishowingvthejpivoted member swung allthe wayout-"of engagement with the suckerfrod.

Fig. 8.

Fig. 9 is` a detail section on the line .9.-9 vofV showing the pivotedcollar in'its subsequent j The improved holding device is illustrated iY as employed in Vconnection with a usual pump casing l having thesucker rod' com- 70 prising sections 2 Vconnected by enlarged couplingmembers 3 Yextending through the pump casing.

` yThe improved holdingmeans is arranged to permit withdrawal'of theIsucker rod seetion after section, and .to automatically swing intoengagement 'beneatheachfsucf I ceeding coupling member of thesucker rodto fprevent subsequent .return ofthefsucker' rod intol the pump f'casingYV while thewithf.

drawn section of the rod isr'emoved; The holding/member isp'referably'detach-V ably mounted upon" the upper Vend of the lpump casing with'thesuckerrod `extending through the sameand having a pivotedcol-V laroounterbalance'd atits -upper end adapt# 'ed to swino' downwardlyagainstthe upper end of the yolding member so as to engage a couplingmember of the sucker rod, Aor to swing upwardly from the holding memberso kas -to disenga-ge the suckerrod; .4

In the particular'embodiment of the invention illustrated, .the holdingmember is shown yas a casing 4 received `over the end of the vided witha lower end 5 receiving'the pump pumpcasing and having a borevpro- Ycasing, and an upwardly convergentlyjtapering portion- 6 4vforming arestricted opening'? in the borefand vthenfterminating in an out-Vwardly tapering portion 8 atv the upper'end ofthebore. V

V"l" he casing 'i'spreferably longitudinally split as shown atv 10 and.maybesecured to thepump casing-.by means `of set screw-S11 extendingradiallythrough .the casing fl and f engaging the Vpump casing.- Therestricted opening 7 inthe bore of casing'fi is-ofsuch size as to permit.ofthe'passag'e ofthe en larged coupling members :ofthe sucker rod, andthe tapering portions .6 and 8 ,ofthe-bore are arranged'to'guide thesucker rod-into co-operating squared opening 16 in the opposite lug ot'the collar plate. The rod may be held in position with relation to thecollar plate and casing 4 by a usualnut 1T threadedronto its end beyondthe squared portion oi the rod, and the opposite end of the rodterminates in an angularly dis- Yposed arm 18 having. a counterbalancingweight 19 upon the end thereoi2 and is preferably held in position by ay'nut 2O threaded onto the end of the arm. By this arrangement it will beseen that the collar plate is horizontally pivoted with relation tocasing 4, and by reference to Fig. 1 it will be noted that the weightedarm 18 is so arranged as to normally swing the collar plate downwardlyinto position against the upper surface of casing 4.

The collar plate is provided with an opening 22 extending inwardly fromits swinging end and terminating in a circular enlargement 28 having awearing bushing24 positioned around therim thereofrand arranged inalinement with the suckery rod extending through the holding device.This annular enlargement is of such diameter as to permit ot the treepassage therethrough of the sei-tions of the sucker rod, while at theSametime engaging the enlarged coupling members 3 ot the sucker rod soas to prevent movement thereofthrough the collar plate.

ln operation, as the sucker rod is withdrawn from 7the pump casing andthrough the holding device 10, the coupling members 3 willimpingezagainst the under side ot the collar plate 12, as shown in Fig.4, so as to swing the collar plate upwardly into the position showninFigo and thereby permit of withdrawal of the sucker rod. As soon as thecoupling 3 has passed beyond the 'collar plate, it i will be returned byvweighted arm 18 to its position against the upper surface ot casing 4,as clearly shown in Fig. 6, andwill thus prevent return movenient of thesucker rod into the pump casing by the impingement .of coupling 3against the wearingbushing of the collar plate. The projecting sectionof the sucker rod may then be unscrewed and removed in the usual manner.Succeeding sections of the sucker rod may then be withdrawn and vzemovedin a similar mannen. f y P When it is desired to make the holdingdevice inoperative, the collar plate 12l is swung upwardly andrearwardly upon its pivot a sumcient distance to entirely disengage thesucker rod, as clearly shown in Fig. S, and the collar plate ispreferably yieldably held in this position as by provid. i

yieldably urging the ball into contact with the adjacent surface of thelug 13 so asto engage in recess 30 and thereby retain the rollarplate inits upwardly swung position. It will be understood that when su'lhcient`torce is exerted upon the collar plate, spring SB'will be compressed soas to'permit dis` engagement of ball'31 from recess 30 in order that thecollar plate may be swung back into operative position. It will thus beseen that l have provided a simple and compact mechanism adapted to -bereadilyv mounted upon a pump casing and so arranged as to permit of theready withdrawal of a sucker rod section after section, while alsoarranged Lto automatically swing into operative position beneath jthesucceeding coupling members of the sucker rod so as ton prevent returnoit the sticker rod into Athe pump casing.

Various changes Amay be ina-de without departing from Ithe spirittof theinvention as claimed.` Y -f f i What is claimed is: i f i Y 1. Thecombination with a pump casing and a sucker rod therein having enlargedcoupling members, of holding means secured to the pump casingwith thesucker rod proy jecting through the same, and including a pivotedcounterbalanced .collar V,normally swung into positionA engaging beneatha coupling member of the sucker rod. f

2. The combination with a pump casing and a sucker 'rod therein-having4enlarged couplingrmembers, of holding means secured to the pump casingwith. the sucker. rod projecting through the same, and including apivoted counterbalanced collar normally swunginto positionyengagingibeneath acoupling memberofthe sucker rod, and Varranged to beswung upwardly by the next lower coupling. member upon the sucker rodimpinging against the same so as to permit withdrawal of the sucker rod,v

3. Thecombination witha pump casing and a sucker rod therein havingenlarged coupling members, of holding means secured to the pump casingwith the sucker rod projecting through the same, a pivoted collarthavinga weighted arm so .as to be normally swung into position engagingbeneath a coupling memberof the sucker rod.

4. The'combination with a pump casing and a sucker rod therein havingenlarged and including coupling members, of holding means secured to thepump casing with the sucker rod pro-V jecting through the same, andincluding a pivoted collar normally swung into position engaging beneatha coupling member of the sucker rod7 said collar being also arranged tobe swung out of engagement with said sucker rod and having yieldableengaging means for retaining the collar in said latter position.

5. The combination with a pump casing and a. sucker rod therein havingenlarged coupling members, of holding means secured to the pump casingwith the sucker rod projecting through the same, and including a pivotedcollar normally swung' into position engaging beneath a coupling memberof the sucker rod, and arranged to be swung upwardly by the neXt lowerVcoupling member upon the sucker rod impinging against the same so as topermit withdrawal of the sucker rod7 said collar being also arrangedtorbe swung upwardlyV beyond the position to which it is moved by saidsucker rod and having yieldable enga 'ng means-for retain` positionengaging beneath a couplingmem-` ber of the sucker rod. l

7 The combination with a sucker rod having enlarged coupling members, ofholding means includingv al pivoted counterbalanced collar normallyswung into position engaging beneath a coupling `member of the suckerrod.

In testimony whereof I have signed my name to this-s ecication.

ALPH H. STEGEMAN.

